Evidence of electron impact ionization on the nightside of Venus from Pioneer Venus Orbiter Ion Mass Spectrometer measurements near solar minimum

1994 ◽  
Vol 99 (A6) ◽  
pp. 11351 ◽  
Author(s):  
J. Kar ◽  
R. E. Hartle ◽  
J. M. Grebowsky ◽  
W. T. Kasprzak ◽  
T. M. Donahue ◽  
...  
Keyword(s):  
Electron Impact ◽  
Mass Spectrometer ◽  
Solar Minimum ◽  
Impact Ionization ◽  
Electron Impact Ionization

Low Energy Electron Impact Ionization and Fragmentation: Cyclobutanone

1973 ◽  
Vol 51 (4) ◽  
pp. 624-627 ◽  
Author(s):  
Graham Richard Branton ◽  
Claudio Kong Nam Pua
Keyword(s):  
Energy Distribution ◽  
Electron Impact ◽  
Mass Spectrometer ◽  
Ionization Energy ◽  
Impact Ionization ◽  
Electron Impact Ionization ◽  
Low Energy ◽  
Energy Electron ◽  
Low Energy Electron

Cyclobutanone is shown to yield both C3H6+ and C2H2O+ ions on fragmentation under electron impact in a mass spectrometer. Using the energy distribution difference (EDD) technique the ionization energy of cyclobutanone is found to be 9.58 eV and the appearance potentials of the C3H6+ and C2H2O+ ions are found to be 9.85 and 10.53 eV, respectively.

A Search for Solar Cycle Variability in the Nightside Ionosphere of Mars

2020 ◽  
Author(s):  
Zachary Girazian ◽  
Jasper Halekas
Keyword(s):  
Solar Cycle ◽  
Ion Transport ◽  
Electron Impact ◽  
Solar Minimum ◽  
Impact Ionization ◽  
Solar Maximum ◽  
Electron Impact Ionization ◽  
Mars Atmosphere ◽  
Relative Contribution ◽  
Cyclical Variability

<p>The nightside ionosphere of Mars is mainly produced by a combination of electron impact ionization and day-to-night ion transport. The relative contribution of these two sources, and their variability over the solar cycle, has not been well established. To address this issue, we use Mars Atmosphere and Volatile EvolutioN (MAVEN) observations to search for cyclical variability in nightside ion densities over the solar cycle. We find that nightside densities (O<sup>+</sup> in particular) were significantly higher during solar maximum (2014) than during solar minimum (2019). Our results suggest that, similar to the nightside ionosphere of Venus, day-to-night transport of O<sup>+</sup> ions is more prominent during solar maximum.</p>

Laser-induced electron impact ionization in a reflectron time-of-flight mass spectrometer

1993 ◽  
Vol 28 (12) ◽  
pp. 1467-1475 ◽  
Author(s):  
F. Moritz ◽  
M. Dey ◽  
K. Zipperer ◽  
S. Prinke ◽  
J. Grotemeyer
Keyword(s):  
Electron Impact ◽  
Mass Spectrometer ◽  
Impact Ionization ◽  
Time Of Flight ◽  
Electron Impact Ionization ◽  
Flight Mass Spectrometer

Electron impact ionization in a microion trap mass spectrometer

1999 ◽  
Vol 70 (10) ◽  
pp. 3907-3909 ◽  
Author(s):  
Oleg Kornienko ◽  
Peter T. A. Reilly ◽  
William B. Whitten ◽  
J. Michael Ramsey
Keyword(s):  
Electron Impact ◽  
Mass Spectrometer ◽  
Impact Ionization ◽  
Electron Impact Ionization
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